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Radio Propagation


Solar X-rays:
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Geomagnetic field:
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D-Region Absorption
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Created by PA4RM

ARRL Headquarters will be closed Thursday and Friday, November 28 and 29, for Thanksgiving. The ARRL Letter and ARRL Audio News will not be available on those days. The next editions will be on December 5 and 6, respectively. We wish everyone a safe and enjoyable Thanksgiving. ARRL Headquarters will reopen on Monday, December 2, at 8 AM ET.

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